METHOD AND DEVICE FOR MONITORING ARTERIAL BLOOD PRESSURE Russian patent published in 2007 - IPC A61B5/22 

FIELD: medical equipment.

SUBSTANCE: method and device can be used for continuous tracking of parameters of arterial blood pressure. Method provides perception of pulse oscillations in point where artery is disposed closer to surface of coverlet; it also provides re-calculation of values of those oscillations into values of arterial blood pressure by means of scaling factor which is achieved during individual calibration in form of relation of amplitude of pulse oscillations to difference between higher and lower values of arterial pressure. Pulse oscillations are transformed into light flux that is perceived by photoelectric detector; amplitude of calibration pulse is memorized as well as value of output value of photoelectric detector, which value corresponds to zero value of arterial blood pressure. For the purpose, light source is shortly switched off and dark current value is registered. Then light source is shortly switched directly to input of photoelectric detector through calibration light guide. Value of photoelectric current is registered and amplitude of calibration pulse is achieved by subtracting dark current value from the value. Output value of photodetector is achieved by subtraction of value, being equal to product of higher and lower values of arterial blood pressure as well as scaling factor, from value of output value of photoelectric detector. Value of arterial blood pressure is determined by subtraction of value, which corresponds to zero value of arterial blood pressure, from current value of output value of photoelectric detector; later achieved difference is multiplied by scaling factor. Amplitude of calibration pulse and value of output value of photoelectric detector are measured periodically while taking relation of amplitude of calibration pulse during calibration process to its current amplitude into account. To realize the method, device has microcontroller, light source disposed above inputs of calibration and output light guides. Outputs of calibration and input light guides are disposed under photoelectric detector, which is connected with microcontroller. Semi-transparent wedge is disposed in central part calibration light guide. There is shutter between light source and input of calibration light guide; shutter is capable of closing light flux.

EFFECT: simplified realization of method.

2 cl, 1 dwg